The only thing better than Kelly Clarkson and Ariana Grande's modern Christmas duet "Santa, Can't You Hear Me" is hearing the two icons perform it live — and that's exactly what happened during NBC's ...

"The coolest thing about you, though — I really hope people get to see from you, like, just working with you on the show — backstage, I have to have my eye makeup redone, she's hysterical," Clarkson ...